[Oracle] ORA-00845: memory_target not supported on this system solution

OS: redhat6 oracle11.2

Description:

ORA-00845: memory_target not supported on this system

[Oracle @ Oracle DBS] $ sqlplus "/As sysdba"
SQL> startup
ORA-00845: memory_target not supported on this system

Solution:
[Oracle @ Oracle DBS] $ DF-H/dev/SHM
Filesystem size used avail use % mounted on
Tmpfs 2.4g 1.2G 1.3G 48%/dev/SHM

[Oracle @ Oracle DBS] $ su Root
Password:
[Root @ Oracle DBS] # Mount-O remount, size = 4g/dev/SHM
[Root @ Oracle DBS] # exit
Exit
[Oracle @ Oracle DBS] $ DF-H | grep SHM
Tmpfs 4.0g 1.2G 2.9g 29%/dev/SHM
[Oracle @ Oracle DBS] $ sqlplus "/As sysdba"
SQL> startup
Oracle instance started.
Conclusion: The actual value of a parameter exceeds the actual threshold.